螺旋形導管 的英文怎麼說

中文拼音 [luóxuánxíngdǎoguǎn]
螺旋形導管 英文
spiral shaped catheter
  • : 1. [動物學] (軟體動物) spiral shell; snail; conch 2. (螺旋形的指紋) whorl (in fingerprint)
  • : 旋Ⅰ動詞1 (旋轉) whirl 2 (用車床切削或用刀子轉著圈地削) turn sth on a lathe; lathe; pare Ⅱ名詞...
  • : 動詞1. (引導) lead; guide 2. (傳導) transmit; conduct 3. (開導) instruct; teach; give guidance to
  • : Ⅰ名詞1 (管子) pipe; tube 2 (吹奏的樂器) wind musical instrument 3 (形狀似管的電器件) valve;...
  • 螺旋 : 1 (具有螺紋的圓柱體 屬于斜面類的簡單機械) corkscrewspin; screw; spiral; helix 2 (螺旋現象;尾旋...
  1. In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively

    本文通過試驗研究與理論分析對流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討,取得以下主要成果:一、結合小灣工程流洞改建,對高水頭( 252m ) 、大泄流量( 1400m ~ 3 s )條件下流式豎井中的水流運動特徵進行了比較全面的測量,包括空腔態、徑向流速分佈及井壁壓強等;二、提出了豎井空腔段水流水力計算方法,其計算結果與實測值吻合良好;三、利用試驗與計算結果,對流式豎井的消能機理進行了探討,對豎井各部分的消能能力有了總體認識;四、對豎井下部消力井的合理井深進行了優化試驗研究,發現消力井合理深度為0 . 9d左右;五、通過試驗研究,歸納出豎井水流總摻氣量估算方法,為流洞排氣方案的設計提供了參考依據;六、在高水頭、大流量條件下,豎井空腔段下部流速很高,盡水流運動引起的離心力可以確保井壁壓強保持正壓,但空化數依然較低,因此豎井的空化空蝕始終是工程界關注的重大問題。
  2. ( b ) the linear fluid model is used to study the conductor - centered helical groove twt. we have analyzed the effects of the beam parameters on the gain and the bandwidth of the twt

    ( 2 )我們用線性理論模型研究了具有中心體軸的矩槽行波內的注-波互作用特性,對電子注參量對小信號增益和帶寬的影響進行了分析。
  3. Pvc standard specification for poly vinyl chloride profile strip for machine spiral - wound liner pipe rehabilitation of existing sewers and conduits

    現用下水道和的機制修復用聚氯乙烯
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